Differential evolution strategy cum equivalent circuit method for the design of multi-band frequency selective surfaces

The paper presents the design of multiband frequency selective surfaces (FSS) using the differential evolution strategy (DES) cum equivalent circuit method (ECM). Two examples are demonstrated to design a dual-band gridded-square and a triple-band gridded-double-square array respectively. Good agreements are obtained between the simulation results and experimental results. The good results under very short computational time and none trial-and-error procedure demonstrate the feasibility of the proposed method.